Brightly-coloured parrot (7)
'brightly-coloured parrot' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for macaw that I've seen before include "Large and showy Latin American parrot" , "Brightly-coloured parrot" , "Large colourful parrot" , "Tropical bird" , "Chattering cousin of a cockatoo" .)
(Other definitions for rosella that I've seen before include "Australian flyer" , "Australian parakeet" , "Aussie bird" , "Parrot" .)